Pneumatic picker for looms.



No. 69!,726. j Patented Ian. 2|, 902.

J. VON MINISZEWSKI. PNEUMATIC PIGKER FOR LOUMS.

(Application filed. Oct. 21, 1899.) (No Model.) 2 Sheets-Sheet I.

., lil

No. 69!,726. Patented I an. 2|, I902.

J. VON MINISZEWSKI.

PNEUMATIC PICKER FUR LOUMS.

Ap iimion filed Oct. 21, 1899.) (No Model.) 2 Sheets-Shaat 2.

THE uonms F'Erins co. PHOTO-Lima, WASHINGTON, n, c.

UNITED STATES PATENT OFFICE.

JOSEF VON MINISZEWSKI, OF PETRIKAU, RUSSIA, ASSIGNOR OF ONE-HALF TO THEOFIL VON MOHL, OF WYSZKI, RUSSIA.

P NEUMATIC PICKER FOR LOOMS.

SEEGIFIGATION forming part of Letters Patent No. 691,726, dated January 21, 1902. Application filed Obtober 21,1899. Serial No. 734,394. (No model.)

ence being had to the accompanying drawi ings, and to letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to a loom whose shuttle is picked to and fro by compressed air supplied by a compressor placed on the batten or a pump W ose piston is worked by any suitable moving part of the loom-for example, by the batten or the shaft which gives the batten its reciprocating motion. The compressed air flows through pipes located on the batten into cylinders, each of whose pistons throws the shuttle through the shed into the opposite shuttle-box or cylinder, whereby the picking-piston of such shuttle-box or cylinder, which is situated at its inner end position, is moved outward, the compressed air on the outer side of the piston acting as a buffer to reduce the shock.

Figure l of the accompanying drawings shows in front elevation, as an example, so much of a loom as is necessary to illustrate the application of the invention thereto. Figs. 2 and 3 are sections taken, respectively, on. lines a; 00 and y y of Fig. 1. Figs. 4 and 5 show in two sections perpendicularto one another the air-cut-off mechanism (in this example a slide) for the cylinders containing the picking-pistons.

As will be seen, on the under side of the batten-piece a there is fixed a cylinder 1), which is open at the bottom and-whose piston c is connected with a cross-head d, guided in a straight line in the usual manner. This cross-head is driven by any suitable moving part of the loom. In the example shown the piston is moved to and fro by the batten itself, for which purpose the cross-head d is connected through a link e with a suitable fixed part f of the 100m. When the batten moves to and fro, the link 6, as will be seen on reference to Fig. 2, causes the movement of the cross-head d and the piston c. The motion of the latter might also be transmitted by known means from the crank-shaft w, that moves the batten, as will be readily understood.

The cover of the cylinder b is provided with an ordinary suction-valve g and with outlet unions forthe compressed air, which passes through the pipes h into cylinders 2 arranged on opposite sides of the loom and fixed'on the batten. The two cylinders are placed at the outer ends of the shuttle-boxes 7c and in line therewith. At the inlet of each of these cylinders i there is placed any desired air-cutoff devicefor instance, as shown, slide j,

which is normally forced outwardly by a spring Z. This slide has two openings 1 and 2, of which the former when the slide is in one end position, Figs. 4 and 5, corresponds to an aperture 3 in the cylinder-cover, whereby the inside of the cylinder is put into communication with the open air. If the slide,

however, is moved against the action of the spring into the second end position, the second opening 2 in the slide corresponds to the inlet 4. for the compressed air, while the opening 1 is closed. I

.Each of the cylinders t'contains a piston m, which is forced toward the mouth of the cylinder by the inflowing compressed air, causing the shuttle to be ejected from the cylinder and thrown across the shed into the opposite shuttle-boxlo or cylinder t', and immediately thereafter the cylinder that actuated the shuttle is vented to the atmosphere through the alined ports 1 3. The shuttle is then driven through the shed into the opposite cylinder, where it strikes the piston of this cylinder, which will have been retained against the rubber buffer 0 of the flange n at the mouth of the cylinder 1', and drives it in to compress the air in said cylinder, which, owing to the slow discharge through the ports 1 3, causes I the piston on the air-cushion formed behind the piston to act as a buder, so that violent shocks will be obviated.

The motion of the slide j or the other aircut off device provided can be advanta geously imparted by the crank-shaft 10. For this purpose there is fixed on each end of this shaft a cam-disk or an eccentric p, which causes the movement of the slide at the proper moment by means of known connecting parts, in consequence of which the compressed air can enter the cylinder 2' and force the pickin g-piston m toward the mouth of the cylinder.

The inflow of compressed air into the cylinder t should only occur, however, when there is a shuttle in the shuttle-box, (orpartlyin the cylinder For this purpose an arrangement similar to a weft-detector is provided. This is composed of a feeling-lever g, which is held up by a spring and is secured so as to be capable of being swung in front of the mouth of the cylinder and one of whose arms projects into the shuttle-race when there is no shuttle in the shuttle-box. The second arm of the feeling-lever is provided with a fiat bar .9, which when in its highestposition is out of reach of the roller-lever 0*, which is under spring-pressure and is under influence of the eccentric 19, so that although the lever r is moved by the eccentric p the bar 3 is not acted on, (see the right-hand end of Fig. 1,) and consequently the slidej receives no inward movement. If, however, there is a shuttie in the cylinder 2 the feeling-lever q is swung into the position indicated by the broken lines in Figs. 3 and 4, the bar 8 being lowered to such an extent that it comes within the reach of the roller-lever 1", which therefore moves the bar 8 and forces the slide j against the action of the spring into the position in which the compressed air can flow into the cylinder 2' and throw out the shuttle.

The compressed-air arrangement described enables the number of revolutions of the l oom to be considerably increased, as the picking occurs with more precision than heretofore and the shed does not require to be opened so widely as hitherto usual. The compressor also being connected to the batten has a braking action upon it as soon as it moves out of the shed-z. 6., toward the healdsso that no shocks can occur.

I claim-- 1. A pneumatic picker for looms, comprising a batten, a cylinder thereon at each end of the shuttle-race, said cylinders having their proximate ends open, a picking-piston in each cylinder, an air-forcing device, means for operating the same and compressed-air inletpipes connecting the cylinders with the forcing device; in combination with a valve operating to closeand open the said pipes, and valve-actuating mechanism for each cylinder controlled by the shuttle and organized to open the compressed-air pipes when said shuttle enters or is about to enter one of the cylinders, for the purpose set forth.

2. A pneumatic picker for looms, comprising a batten, a cylinder thereon at each end of the shuttle-race, said cylinders having their proximate ends open, a picking-piston in each cylinder, an air-forcing device, means for operating the same, and pipes connecting the picking-cylinders with the forcing device; in combination with a valve operating to close and open each pipe, valve-actuating mechanism, and a timing device controlled by the shuttle and timing the operation of said mechanism to admit compressed air to the cylinders when said shuttle enters or is about to enter a picking-cylinder, for the purpose set forth.

3. A pneumatic picker for looms, comprising a batten, a cylinder thereon at each end of the shuttle-race, said cylinders having their proximate ends open and closed ends normally vented to the atmosphere, a picking-piston in each cylinder, an air-forcing device, pipes connecting said device to the cylinders at their closed ends; in combination with valves operating to close the vents and open the admission of air from said pipes to the cylinders, valve actuating mechanism and means operated by the shuttle to transmit motion from the valve-actuating mechanism to the valve, for the purpose set forth.

4. A pneumatic picker for looms, comprising abatten, a cylinder thereon at each end of the shuttle-race, said cylinders having their proximate ends open, a picking-piston in each cylinder, the latter having inlet-ports and exhaustports of comparatively small area, a valve-casing on each cylinder having corresponding inlet and exhaust ports, and a compressed air connection between the inletports of the valve-casings and the air-forcing device; in combination with a valve in each casing and mechanism contrdlled by the shuttle and organized to operate the valves to admit compressed air to the'cylinders when said shuttle enters or is about to enter one of the cylinders, for the purpose set forth.

5. A pneumatic picker for looms, comprising a batten, a cylinder thereon at each end of the sh Little-race, said cylinders having their proximate ends open, a picker-piston in each cylinder, an air-forcing device mounted on and operated by the movements of the batten, a compressed-air connection between the forcing device and the cylinders, and means controlling the admission of compressed air to and its exhaust from said cylinders, said means controlled by the shuttle as it enters or is about to enter a cylinder, for the purpose set forth.

6. The combination with the picker-cylinders, the shuttle-race, the spring-actuated valve j, the crank-shaft to carrying cams p, and the valve-actuating levers r acted on by said cams; of the feelers (1 having an arm projecting into the path of the shuttle, and an arm .9, adapted to swing into the path of the lovers r and valve j when the shuttle impinges upon the feeler-arm in its path and thereby tilts said feeler, for the purpose set forth.

7. The combination with the picker-cylinders, the shuttle-race, the spring-actuated valve j, the crank-shaft 20 carrying cams p, and the valve-actuating levers r acted on by said cams; of the feelers q having an arm projecting into the path of the shuttle, and an In testimony that I claim the foregoing as arm 3, adapted to swing into the path of the my invention I have signed my name in presleversr and valve j when the shuttle impinges ence of two subscribing witnesses.

upon the feeler-arm in its path and'thereby J OSEF VON MINISZEWSKI. 5 tilts said feeler, and means for returning the Witnesses:

feeler into a normal position, for the purpose ALVESTO S. HOGUE,

set forth. AUGUST FUGGER. 

